SUB-ITEM 77K

                  CHANGES IN REGISTRANT'S CERTIFYING ACCOUNTANT

                      INVESCO INSURED MUNICIPAL BOND TRUST

The Audit Committee of the Board of Trustees of the Trust appointed, and the
Board of Trustees ratified and approved, PricewaterhouseCoopers LLP ("PWC") as
the independent registered public accounting firm of the Fund for the fiscal
year ended October 31, 2010.

Prior to May 31, 2010, the fund was audited by a different independent
registered public accounting firm (the "Prior Auditor").

The Board of Trustees selected a new independent auditor for the Fund's current
fiscal year in connection with the appointment of Invesco Advisers as investment
adviser to the Fund ("New Advisory Agreement").

Effective June 1, 2010, the Prior Auditor resigned as the independent registered
public accounting firm of the Fund.

The Prior Auditor's report on the financial statements of the Fund for the past
two years did not contain an adverse opinion or a disclaimer of opinion, and was
not qualified or modified as to uncertainty, audit scope or accounting
principles.

During the period the Prior Auditor was engaged, there were no disagreements
with the Prior Auditor on any matter of accounting principles or practices,
financial statement disclosure, or auditing scope or procedures which, if not
resolved to the Prior Auditor's satisfaction, would have caused it to make
reference to that matter in connection with its report.

(Letter dated December 30, 2010 from Deloitte & Touche LLP is attached as
Attachment A to this exhibit.)



                                                                    ATTACHMENT A

December 30, 2010

Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549-7561

Dear Sirs/Madams:

We have read Item 77K of Invesco Insured Municipal Bond Trust Form N-SAR dated
December 30, 2010 and we agree with the statements made therein.

Yours truly,


/s/ Deloitte & Touche LLP